Abstract
Growth and symbiotic activity of legumes are mediated by Nod factors (LCO, lipo-chitooligosaccharides). To assess the effects of application of Nod factors on symbiotic activity and yield of pea, a two-year field experiment was conducted on a Haplic Luvisol developed from loess. Nod factors were isolated from Rhizobium leguminosarum bv. viciae strain GR09. Pea seeds were treated with the Nod factors (10⁻¹¹ M) or water (control) before planting. Symbiotic activity was evaluated by measurements of nitrogenase activity (acetylene reduction assay), nodule number and mass, and top growth by shoot mass, leaf area, and seed and protein yield. Nod factors generally improved pea yield and nitrogenase activity in the relatively dry growing season 2012, but not in the wet growing season in 2013 due to different weather conditions.
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Claims 4
Claim · model-written summary
Nod factors generally improved pea yield in the relatively dry 2012 season.
- Taxon
- pea
Lathyrus oleraceuse0 - Treatment
- Nod factorse0
- Outcome
- pea yielde0
- Direction
- improvede0
- Setting
- relatively dry growing season 2012e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nod factors generally improved pea yield and nitrogenase activity in the relatively dry growing season 2012, but not in the wet growing season in 2013 due to different weather conditions.”
Claim · model-written summary
Nod factors generally improved pea nitrogenase activity in the relatively dry 2012 season.
- Taxon
- peaLathyrus oleraceuse0
- Treatment
- Nod factorse0
- Outcome
- nitrogenase activitye0
- Direction
- improvede0
- Setting
- relatively dry growing season 2012e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nod factors generally improved pea yield and nitrogenase activity in the relatively dry growing season 2012, but not in the wet growing season in 2013 due to different weather conditions.”
Claim · model-written summary
Nod factors did not generally improve pea yield in the wet 2013 season.
- Taxon
- peaLathyrus oleraceuse0
- Treatment
- Nod factorse0
- Outcome
- pea yielde0
- Direction
- note0
- Setting
- wet growing season in 2013e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nod factors generally improved pea yield and nitrogenase activity in the relatively dry growing season 2012, but not in the wet growing season in 2013 due to different weather conditions.”
Claim · model-written summary
Nod factors did not generally improve nitrogenase activity in the wet 2013 season.
- Taxon
- peaLathyrus oleraceuse0
- Treatment
- Nod factorse0
- Outcome
- nitrogenase activitye0
- Direction
- note0
- Setting
- wet growing season in 2013e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nod factors generally improved pea yield and nitrogenase activity in the relatively dry growing season 2012, but not in the wet growing season in 2013 due to different weather conditions.”
The same questions in other papers
nodulation factor · yield · Lathyrus oleraceus (pea)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.